Designed for use on either rotary or reciprocating shakers.

• Autoclavable
• Specially designed to maximize aeration for improved growth
• Pinched neck design to reduce splashing on flasks with four baffles

Feature a marking spot on the side of the flask and a break-resistant lip, which accommodates a cotton plug or stopper. Made of wheaton 33® low-extractable borosilicate glass, which meets ASTM Type I Class A and USP Type I standards.